This craft gives new meaning to the phrase “eternal summer.” Cornstarch helps thicken sand into a Play-Doh-like consistency that can be molded to your liking. We’re wild over Jodi’s elegant sand castle that won’t get washed away by the waves.

Fashion your own glow-in-the-dark dye using vinegar and fluorescent paint. Then, dip hard-boiled eggs into a wealth of fun, glowy colors to create magical looking orbs. This activity is best done outdoors and even better done at night.